PDF malware analysis — malicious · b8f1a379efe75f19

MALICIOUS

PDF

74.6 KB Created: 2021-09-06 06:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: b5c9c9afcb07f017d538c68a5d238f35 SHA-1: 9171ecc71e356c737fcab0c1b1e64c1636add8b1 SHA-256: b8f1a379efe75f1922d49f18ad32458aef2dbc21fffee0f021dcf8098e9371bf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristic analysis revealed that the PDF contains a link farm pointing to multiple compromised websites, suggesting a phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable, but the presence of numerous external links on potentially compromised domains strongly supports a malicious purpose.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bb4d1df4e---vapefasimonefevak.pdf In PDF document text
- http://perles-del-beya.com/userfiles/file/5444698922.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6354d5ad03---tisupelesoravezo.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec5db5bbfc---59167604901.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/3955df58d0a36d8e9a007885dd2afa74/kutuzipur.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/57dd9c01e8b3418fd44ac0270806da3d/38385303725.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/nbqj2c54c4un6rb3o3nq2j9qjs/limubefixaziriluve.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39997628e2---25727870617.pdfIn PDF document text
- https://lionkingbali.com/uploads/file/14424860287.pdfIn PDF document text
- http://trans-serwis.com/userfiles/file/wujenoviso.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/vifonidurev.pdfIn PDF document text
- http://jinruily.com/UploadFile/file/20210818165720973.pdfIn PDF document text
- https://pima-alarms.net/slicice/file/85590943757.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e1e105f3650---savus.pdfIn PDF document text
- https://hse.tw/upload/file/45730657311.pdfIn PDF document text
- https://rivieresoceanie.com/userfiles/file/51169453453.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/35a97116f9c2ef84b061d5f0c52b70cb/donuputonivujukodufiruju.pdfIn PDF document text
- http://balone.net/_upload/file///gumotedolevasimejopajigi.pdfIn PDF document text
- https://mtydizayn.com/userfiles/file/5058333600.pdfIn PDF document text
- http://axiomestates.com/userfiles/file/dovigoxovuvafawus.pdfIn PDF document text
- http://cnmrobotics.com/files/files/17529367787.pdfIn PDF document text
- http://namadagaskare.ru/ckfinder/userfiles/files/25304297509.pdfIn PDF document text
- https://duocvinhkim.com/userfiles/file/fijuj.pdfIn PDF document text
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6920ebd3b3---28474296358.pdfIn PDF document text
- http://2478.ru/admin/ckfinder/userfiles/files/4130672060.pdfIn PDF document text
- https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/85126841635.pdfIn PDF document text
- http://mwcapital.net//ckfinder/userfiles/files/sogiburifekowo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=spm+add+maths+formula+list+pdfPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bff4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFF4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d80b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD80B	10704 bytes
SHA-256: `0804c35c3f7a6c4636b21f2f03ffd310214604c06c626aba02791fd878fd6fcc`
`font_02_sfnt_off0000f083.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF083	17452 bytes
SHA-256: `2d3e7b56acecf46d2d30535513ed046ebe437a823851d09cec69a17514497e07`

Open this report in the interactive analyzer, or submit your own file for analysis.